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(1) Standard and consistent field and laboratory methods must be used to obtain and evaluate vegetation data consistent with 82-4-233 and 82-4-235 , MCA, and to compare revegetated area data with reference area data and/or with technical standards. Specific field and laboratory methods used and schedules of assessments must be detailed in a plan of study and be approved by the department. Sample adequacy must be demonstrated. In addition to these and other requirements described in this rule, the department shall supply guidelines regarding acceptable field and laboratory methods.

(2) Production, cover, and density shall be considered equal to the approved success standard when they are equal to or greater than 90% of the standard with 90% statistical confidence, using an appropriate (parametric or non-parametric) one-tail test with a 10% alpha error.

(3) The revegetated areas must meet the performance standards in (1) and (2) for at least two of the last four years of the phase III bond period. Pursuant to ARM 17.24.1113, the department shall evaluate the vegetation at the time of the bond release inspection for phase III to confirm the findings of the quantitative data.

(4) The reestablished vegetation must meet the requirements of the Noxious Weed Management Act ( 7-22-2101 through 7-22-2153 , MCA, as amended) .

History: 82-4-204, MCA; IMP, 82-4-233, 82-4-235, MCA; NEW, 1980 MAR p. 725, Eff. 4/1/80; AMD, 1990 MAR p. 964, Eff. 5/18/90; AMD, 1994 MAR p. 2957, Eff. 11/11/94; TRANS, from DSL, 1996 MAR p. 3042; AMD, 1999 MAR p. 811, Eff. 4/23/99; AMD, 2004 MAR p. 2548, Eff. 10/22/04.

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